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#!/usr/bin/env perl
# $LynxId: collapse-br,v 1.8 2017/07/04 19:35:45 tom Exp $
# Generate a series of HTML files containing a mixture of text and <br> tags,
# comparing dumps of those to w3m and elinks.
use warnings;
use strict;
use diagnostics;
$| = 1;
use Getopt::Std;
use File::Temp qw/ tempdir /;
our ( $opt_C, $opt_T, $opt_e, $opt_l, $opt_p, $opt_t, $opt_w );
our $tempdir = tempdir( CLEANUP => 1 );
sub dumpit($$) {
my $prog = shift;
my $html = shift;
my $opts = "-dump";
$html =
"<html>"
. "<head><title>T</title></head>"
. "<body>$html</body>"
. "</html>"
if ($opt_t);
my @result;
if ( $prog =~ /lynx$/ ) {
my $name = "$tempdir/lynx.cfg";
$opts .= " -cfg=$name";
open my $fh, ">$name";
printf $fh "collapse_br_tags:%s\n", $opt_C ? "false" : "true";
printf $fh "trim_blank_lines:%s\n", $opt_T ? "false" : "true";
close $fh;
}
if ($opt_p) {
$opts .= " -stdin" if ( $prog =~ /lynx$/ );
$opts .= " -force-html" if ( $prog =~ /elinks$/ );
$opts .= " -T text/html" if ( $prog =~ /w3m$/ );
if ( open my $fh, "echo '$html' | $prog $opts |" ) {
@result = <$fh>;
close $fh;
}
}
else {
my $name = "$tempdir/foobar.html";
open my $fh, ">$name";
printf $fh "%s", $html;
close $fh;
$opts .= " $name";
if ( open my $fh, "$prog $opts |" ) {
@result = <$fh>;
close $fh;
}
}
for my $n ( 0 .. $#result ) {
chomp $result[$n];
}
if ( open my $fh, "echo '$html' | $prog $opts |" ) {
@result = <$fh>;
close $fh;
for my $n ( 0 .. $#result ) {
chomp $result[$n];
}
}
$result[0] = "OOPS" unless ( $#result >= 0 );
return @result;
}
sub header($) {
my @cols = @{ $_[0] };
my $text = "";
for my $c ( 0 .. $#cols ) {
$text .= sprintf "%-8s", $cols[$c];
}
printf "\t %s\n", $text;
}
sub doit() {
my $length = 1;
my $state = -1;
my @tokens;
$tokens[0] = " ";
$tokens[1] = "X";
$tokens[2] = "<br>";
my $tokens = $#tokens + 1;
my @progs;
$progs[ $#progs + 1 ] = "lynx";
$progs[ $#progs + 1 ] = "w3m" if ($opt_w);
$progs[ $#progs + 1 ] = "elinks" if ($opt_e);
$progs[ $#progs + 1 ] = "./lynx" if ( -f "./lynx" );
while ( $length <= $opt_l ) {
my $bits = "";
my $html = "";
my $value = ++$state;
$length = 0;
while ( $value >= 0 ) {
my $digit = $value % $tokens;
my $update = ( $value - $digit ) / $tokens;
last if ( ( $update <= 0 ) and ( $value <= 0 ) and $length > 0 );
$bits .= sprintf "%d", $digit;
$length++;
$html .= $tokens[$digit];
$value = $update;
}
# skip the non-interesting cases
next if ( $bits =~ /00/ );
next if ( $bits =~ /11/ );
next unless ( $bits =~ /2/ );
printf "%-*s '%s'\n", $opt_l, $bits, $html;
my @listing;
for my $p ( 0 .. $#progs ) {
my @q = &dumpit( $progs[$p], $html );
my $l = $p * 8;
for my $r ( 0 .. $#q ) {
$listing[$r] = "" unless ( $listing[$r] );
$listing[$r] = sprintf "%-*s", $l, $listing[$r] if ( $l > 0 );
$listing[$r] .= sprintf "|%s",
substr( $q[$r] . "........", 0, 7 );
}
}
&header( \@progs );
for my $r ( 0 .. $#listing ) {
printf "\t%2d %s|\n", $r, $listing[$r];
}
}
}
sub main::HELP_MESSAGE() {
printf STDERR <<EOF
Usage: $0 [options]
Options:
-C do not collapse BR-tags (lynx only)
-T do not trim blank lines (lynx only)
-e compare with elinks
-l NUM generate test-cases up to this length (default: 3)
-p pipe HTML to the program rather than reading a file
-t add dummy title
-w compare with w3m
EOF
;
exit;
}
&getopts('CTel:ptw') || main::HELP_MESSAGE;
$opt_l = 3 unless ($opt_l);
&doit;
1;
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